/*
*    Qizx/open 3.0 beta
*
* This code is the open-source version of Qizx.
* Copyright (C) 2004-2009 Axyana Software -- All rights reserved.
*
* The contents of this file are subject to the Mozilla Public License 
*  Version 1.1 (the "License"); you may not use this file except in 
*  compliance with the License. You may obtain a copy of the License at
*  http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
*  WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
*  for the specific language governing rights and limitations under the
*  License.
*
* The Initial Developer of the Original Code is Xavier Franc - Axyana Software.
*
*/
using System;
using EvaluationException = System.Qizx.Api.EvaluationException;
using EvalContext = System.Qizx.XQuery.EvalContext;
using ExprDisplay = System.Qizx.XQuery.ExprDisplay;
using Focus = System.Qizx.XQuery.Focus;
using ModuleContext = System.Qizx.XQuery.ModuleContext;
using XQType = System.Qizx.XQuery.XQType;
using XQValue = System.Qizx.XQuery.XQValue;
using System.Qizx.Api;

namespace System.Qizx.XQuery.Op {

    public class ValidateExpr : Expression {

        public const int LAX_MODE = 1;
        public const int STRICT_MODE = 2;
        public const int SKIP_MODE = 3;

        public QName schemaContext;

        public Expression expr;

        public int mode;

        public ValidateExpr(int mode, QName type, Expression expr) {
            this.mode = mode;
            this.schemaContext = type;
            this.expr = expr;
        }

        public override Expression Child(int rank) {
            return rank == 0 ? expr : null;
        }

        public override void Dump(ExprDisplay d) {
            d.header(this);
            d.property("mode", "" + mode);
            d.property("type", schemaContext);
            d.child("expr", expr);
        }

        public override Expression StaticCheck(ModuleContext context, int flags) {
            context.error("XQST0075", this, "validate is not supported");
            type = XQType.NODE.star;
            return this;
        }

        public override XQValue eval(Focus focus, EvalContext context) {
            throw new System.SystemException("ValidateExpr not implemented");
        }
    }
}